Renesas Electronics 71342LA55PFI8 SRAM Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 71342LA55PFI8 is a 32Kbit dual-port asynchronous SRAM memory IC in 64-TQFP surface mount packaging. This component features parallel memory interface with 55 ns access time and write cycle time, organized as 4K x 8 bits, operating across the industrial temperature range of -40°C to 85°C with 4.5V to 5.5V supply voltage.

The 71342LA55PFI8 is classified as obsolete. Locating equivalent or substitute components becomes necessary when original stock is depleted or when design requirements permit faster access time alternatives. The base product number 71342LA remains in production with improved variants that maintain full electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Memory Type	Volatile SRAM
Memory Format	Dual Port, Asynchronous
Memory Size	32Kbit
Memory Organization	4K x 8
Memory Interface	Parallel
Access Time	55 ns
Write Cycle Time	55 ns
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	64-TQFP (14x14)
Mounting Type	Surface Mount
Moisture Sensitivity Level	MSL 3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the 71342LA55PFI8 is determined by the following critical parameters that must remain constant:

Memory size: 32Kbit capacity
Memory organization: 4K x 8 bit configuration
Memory interface: Parallel interface architecture
Package type: 64-TQFP (14x14) surface mount
Voltage supply range: 4.5V ~ 5.5V compatibility
Operating temperature range: -40°C ~ 85°C
Mounting type: Surface mount

The access time and write cycle time may be improved (reduced) without affecting circuit compatibility, as faster memory components operate within the timing constraints of designs specified for slower parts. The 71342LA25PFGI8 qualifies as a direct substitute based on these criteria, offering superior performance characteristics while maintaining identical pinout, package, and electrical interface specifications.

Parameter Comparison

Parameter	71342LA55PFI8 (Main Part)	71342LA25PFGI8 (Substitute)
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Type	Volatile SRAM	Volatile SRAM
Memory Format	Dual Port, Asynchronous	Dual Port, Asynchronous
Memory Size	32Kbit	32Kbit
Memory Organization	4K x 8	4K x 8
Memory Interface	Parallel	Parallel
Access Time	55 ns	25 ns
Write Cycle Time	55 ns	25 ns
Voltage Supply Range	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	64-TQFP (14x14)	64-TQFP (14x14)
Mounting Type	Surface Mount	Surface Mount
Moisture Sensitivity Level	MSL 3 (168 Hours)	MSL 3 (168 Hours)
Product Status	Obsolete	Active
RoHS Compliance	Non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The 71342LA25PFGI8 is the qualified substitute for the obsolete 71342LA55PFI8. Selection of the substitute part is justified on the following engineering grounds:

Product Status: The 71342LA55PFI8 is obsolete, whereas the 71342LA25PFGI8 maintains active production status, ensuring long-term availability and supply chain continuity.

Regulatory Compliance: The 71342LA25PFGI8 achieves ROHS3 compliance, meeting current environmental and regulatory requirements. The original part is non-compliant with modern standards.

Performance Improvement: The substitute part delivers 25 ns access and write cycle times compared to the original 55 ns specification. This performance enhancement is backward-compatible with designs specified for the slower part.

Electrical and Mechanical Compatibility: Both parts share identical voltage supply ranges, operating temperature specifications, package geometry, and pinout configuration, ensuring direct substitution without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the 71342LA25PFGI8 be used as a direct replacement for the 71342LA55PFI8?

A: Yes. The 71342LA25PFGI8 is electrically and mechanically compatible with the 71342LA55PFI8. Both components share identical memory capacity, organization, interface type, package configuration, voltage supply range, and operating temperature specifications. The faster access time of the substitute part does not create compatibility issues in circuits designed for the original 55 ns specification.

Q: What is the primary reason to substitute the 71342LA55PFI8?

A: The 71342LA55PFI8 is classified as obsolete. The 71342LA25PFGI8 provides an active production alternative from the same manufacturer, ensuring component availability and supply chain reliability.

Q: Are there packaging differences between these parts?

A: No. Both the 71342LA55PFI8 and 71342LA25PFGI8 use identical 64-TQFP (14x14) surface mount packaging. The 71342LA25PFGI8 is supplied in Tape & Reel format, which is standard for production quantities.

Q: Does the substitute part meet current environmental standards?

A: Yes. The 71342LA25PFGI8 is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The original 71342LA55PFI8 is non-compliant with modern standards.

Q: What is the performance difference between these parts?

A: The 71342LA25PFGI8 provides faster memory access with 25 ns access time and write cycle time, compared to 55 ns for the original part. This performance improvement is fully backward-compatible with existing circuit designs.

Q: Are the moisture sensitivity levels identical?

A: Yes. Both parts carry MSL 3 (168 Hours) moisture sensitivity classification, requiring identical handling and storage protocols.

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